This JONES_readme20210903.txt file was generated on 20210903 by Rachael JONES ------------------- GENERAL INFORMATION ------------------- 1. Title of Dataset Dataset for: Influence of face shields on exposures to respirable aerosol 2. Author Information Principal Investigator Contact Information Name: Darrah K Sleeth Institution: Department of Family & Preventive Medicine, University of Utah Spencer Fox Eccles School of Medicine Address: 375 Chipeta Way Suite A, Salt Lake City, UT 84108 Email: darrah.sleeth@hsc.utah.edu Co-investigator Contact Information Name: Rachael M Jones Institution: Department of Family & Preventive Medicine, University of Utah Spencer Fox Eccles School of Medicine Address: 375 Chipeta Way Suite A, Salt Lake City, UT 84108 Email: rachael.jones@utah.edu Associate Contact Information Name: Marion J Woodfield Institution: Department of Family & Preventive Medicine, University of Utah Spencer Fox Eccles School of Medicine Address: 375 Chipeta Way Suite A, Salt Lake City, UT 84108 Email: arion.house@hotmail.com 3. Date of data collection (single date, range, approximate date) 20200813-20201110 4. Geographic location of data collection (where was data collected?): Salt Lake City, UT 5. Information about funding sources that supported the collection of the data: This research was supported by the University of Utah Office of the Vice President for Research in partnership with the Immunology, Inflammation and Infectious Disease (3i) Initiative. MW received additional financial support from the Rocky Mountain Center for Occupational and Environmental Health, CDC/NIOSH T42/OH008414. -------------------------- SHARING/ACCESS INFORMATION -------------------------- 1. Licenses/restrictions placed on the data: CC BY NC – Allows others to use and share your data non-commercially and with attribution 2. Links to publications that cite or use the data: Marion J. Woodfield, Rachael M. Jones, Darrah K. Sleeth.(2021) Influence of face shields on exposures to respirable aerosols. Journal of Occupational and Enviornmental Hygiene 3. Links to other publicly accessible locations of the data: None 4. Links/relationships to ancillary data sets: None 5. Was data derived from another source? No If yes, list source(s): 6. Recommended citation for the data: Marion J. Woodfield, Rachael M. Jones, Darrah K. Sleeth (2021) Dataset for: Influence of face shields on exposures to respirable aerosol. The Hive: University of Utah Research Data Repository --------------------- DATA & FILE OVERVIEW --------------------- 1. File List A. Filename: Facecshield_Data_Sharing.csv Short description: This file contains the average particle concentrations measured in each experimental trial. 2. Relationship between files: N/A 3. Additional related data collected that was not included in the current data package: The raw data files downloaded from the aerosol samplers are not included in the data package, but are available upon request. 4. Are there multiple versions of the dataset? No -------------------------- METHODOLOGICAL INFORMATION -------------------------- 1. Description of methods used for collection/generation of data: The experiment was conducted in a low-speed wind tunnel operated to deliver an air velocity of 0.1 m/s. Aerosol of A1 Ultrafine ISO Test Dust was generated upwind in a laminar flow regime using a Topas Solid Aerosol Generator (SAG 410, Topas, GmBH). A life-sized breathing mannequin was positioned downstream. One laser spectrometer (GRIMM 1.109, Aerosol Technik) was positioned to sample through a tube that extended 1 cm from the nostril of the breathing mannequin. A second laser spectrometer (GRIMM 1.109, Aerosol Technik)was positioned to sample aerosol in the laminar airflow 81 cm upstream of the breathing mannequin. Experimental trials were conducted with the mannequin breathing a two rates - low (6 liters per minute) and high (20 liters per minute) - in a stationary, upwind-facing position. Three face shields were tested - A (bucket hat with affixed flexible face shield), B (rigid face shield with rigid adjustable headpiece) and C (rigid face shield with foam and and an elastic strap). Experimental trials were conducted without the face shields, and with each face shield affixed to the breathing mannequin. Further detail is provided in the publication. 2. Methods for processing the data: The average particle concentration measured by the laser spectrophotometer was calculated over the duration of the 15-minute aerosol emission for each particle size bin. 3. Instrument- or software-specific information needed to interpret the data: The GRIMM 1.109 aerosol spectrometer measures particle number concentration (#/0.1L) every 6 seconds in 31 size bins (0.25-31 um physical diameter). 4. Standards and calibration information, if appropriate: A1 Ultrafine ISO Test Dust was used. The GRIMM 1.109 aerosol spectrometers had current factory calibrations. 5. Environmental/experimental conditions: Experiments were conducted in a low-speed wind tunnel, delivering air velocity 0.1 m/s. Temperature and relative humidity were standard room conditions, and were not controlled. 6. Describe any quality-assurance procedures performed on the data: None 7. People involved with sample collection, processing, analysis and/or submission: Marion Woodfield conducted the experiments, processed the raw data, performed data analysis and drafted the manuscript. Rachael Jones performed the final statistical analysis and drafted and edited the manuscript. All authors conceived of the experiments and edited the manuscript. ----------------------------------------- DATA-SPECIFIC INFORMATION FOR: Facecshield_data_sharing.csv ----------------------------------------- 1. Number of variables: 36 2. Number of cases/rows: 110 3. Variable List A. Name: test.date Description: The calendar date the experimental trial was conducted (MM/DD/YY) B. Name: measure.loc Description: Denotes the location where the aerosol concentration was measured in = the aerosol was measured at the nose of the breathing mannequin out = the aerosol was measured 81 cm upstream of the breathing mannequin C. Name: replicate.no Description: Identifies the experimental replicate for the test condition, integer values 1-13 D. Name: breath.rate Description: Indicates the breathing rate of the mannequin in units of liters per minute, 0, 6 or 20 E. Name: shield.code Description: Indicates which type of face shield was used, if any L = no face shield was used A = face shield A (bucket hat) B = face shield B (Bullard-type) C = face shield C (Foam with elastic band) Value labels if appropriate F. Name: d0025 Description: Average particle number concentration in the size bin 0.25 um (#/0.1 L) G. Name: d0028 Description: Average particle number concentration in the size bin 0.28 um (#/0.1 L) H. Name: d0030 Description: Average particle number concentration in the size bin 0.30 um (#/0.1 L) I. Name: d0035 Description: Average particle number concentration in the size bin 0.35 um (#/0.1 L) J. Name: d0040 Description: Average particle number concentration in the size bin 0.40 um (#/0.1 L) K. Name: d0045 Description: Average particle number concentration in the size bin 0.45 um (#/0.1 L) L. Name: d0050 Description: Average particle number concentration in the size bin 0.50 um (#/0.1 L) M. Name: d0058 Description: Average particle number concentration in the size bin 0.58 um (#/0.1 L) N. Name: d0065 Description: Average particle number concentration in the size bin 0.65 um (#/0.1 L) O. Name: d0070 Description: Average particle number concentration in the size bin 0.70 um (#/0.1 L) P. Name: d0080 Description: Average particle number concentration in the size bin 0.80 um (#/0.1 L) Q. Name: d0100 Description: Average particle number concentration in the size bin 1.00 um (#/0.1 L) R. Name: d0130 Description: Average particle number concentration in the size bin 1.30 um (#/0.1 L) S. Name: d0160 Description: Average particle number concentration in the size bin 1.60 um (#/0.1 L) T. Name: d0200 Description: Average particle number concentration in the size bin 2.00 um (#/0.1 L) U. Name: d0250 Description: Average particle number concentration in the size bin 2.50 um (#/0.1 L) V. Name: d0300 Description: Average particle number concentration in the size bin 3.00 um (#/0.1 L) W. Name: d0350 Description: Average particle number concentration in the size bin 3.50 um (#/0.1 L) X. Name: d0400 Description: Average particle number concentration in the size bin 4.00 um (#/0.1 L) Y. Name: d0500 Description: Average particle number concentration in the size bin 5.00 um (#/0.1 L) Z. Name: d0650 Description: Average particle number concentration in the size bin 6.50 um (#/0.1 L) AA. Name: d0750 Description: Average particle number concentration in the size bin 7.50 um (#/0.1 L) AB. Name: d0850 Description: Average particle number concentration in the size bin 8.50 um (#/0.1 L) AC. Name: d1000 Description: Average particle number concentration in the size bin 10.0 um (#/0.1 L) AD. Name: d1250 Description: Average particle number concentration in the size bin 12.5 um (#/0.1 L) AE. Name: d1500 Description: Average particle number concentration in the size bin 15.0 um (#/0.1 L) AF. Name: d1750 Description: Average particle number concentration in the size bin 17.5 um (#/0.1 L) AG. Name: d2000 Description: Average particle number concentration in the size bin 20.0 um (#/0.1 L) AH. Name: d2500 Description: Average particle number concentration in the size bin 25.0 um (#/0.1 L) AI. Name: d3000 Description: Average particle number concentration in the size bin 30.0 um (#/0.1 L) AJ. Name: d3200 Description: Average particle number concentration in the size bin 32.0 um (#/0.1 L) 4. Missing data codes: None 5. Specialized formats of other abbreviations used: None